Patents by Inventor Daniel James Rutherford

Daniel James Rutherford has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Composite pigmentary material
    Patent number: 5869559
    Abstract: A structured composite pigmentary material comprises composite particles consisting of an association of at least one titanium dioxide particle and at least one non-film-forming organic polymer particle wherein the particles are held in association as a result of a positive surface charge on the titanium dioxide particles and a negative surface charge on the polymeric particles, the composition of the composite being such that the ratio by volume of polymeric particles to titanium dioxide particles is in the range 0.3:1 to 0.6:1. An aqueous paint composition and a method of preparing the structured composite pigmentary material are described.
    Type: Grant
    Filed: February 3, 1997
    Date of Patent: February 9, 1999
    Assignee: Tioxide Group Services Limited
    Inventors: Leslie Ainsley Simpson, Daniel James Rutherford, Keith Robson, Michael John Trendell